cornell



UNITED STATES I PATENT- EErcE.

FRANKLIN D. CORNELL, OF ADRIAN, MICHIGAN, ASSIGNOR OF FIVE-EIGIITHS TO MILLARD F. LYON, ALICE A. AGNEW, AND ISAAC L. VILCOX, OF SAME PLACE.

PENclL-SHARPl-:NER-

SPECIFICATION forming part of Letters Patent N o. 594,839, dated November 30, 1897. .Appncaan nea May 1, 1896. Seriana.' 589,825. da modem To @ZZ whom t may concern:

Be it known that I, FRANKLIN D. CORNELL, a citizen of the United States, residing at Adrian, in the county of Lenawee, State ofi Michigan, have invented certain new and usef ful Improvements in Pencil-Sharpeners, and

consists in the construction and arrangement v of parts hereinafter fullyset forth, and pointed out particularly in the claims. A

The object of the invention is t o provide simple and effective means in connection with a chuck pencil-Sharpener, whereby the pencil may be readily sharpened andthe danger of breaking the lead or markingV material ob- 2 5 viated, at the same time providing for a receptacle to retain the shayin'gs cut from the end of the pencil, which object is attained byv the device illustrated in the accompanying' drawings, in which- Q 3o Figure l is a view of my improved sharpener mounted on a table, portions being broken away to more clearly show construction of parts. Fig. 2 is a vertical transverse section on line 2 2, Fig.\1. Fig. 3 is a perspective of the hollow mandrel carrying the knife for sharpening the Wooden case as well as the supplementary socket-chuck carrying the cutter-head for pointing the graphite or marking substance running throughthe 4o wooden case of the pencil. Fig. 4 is an enlarged end elevation of the auxiliary or graphite-pointing cutter-head seated in itsretaining-chuck. Fig. 5 is a perspective of the detachable head carrying the cutting-bit.

ignates a clamping-bracket of suitable form, having a thumb-screw d for securing said bracket to a table or suitable support. J ournaled in said bracket is a shaft B, having 5o suitable bearings b and provided with a crank This inventionV relates to new and useful Vgraphite or marking substance.

Referring to the letters of reference, A desfand head Ato allow for the escape of the chips. 'Surrounding said socket is a cylindrical case C, which is adapted to receive and hold .the

v chips or shavings from the pencils, said case having an opening therein closed by the slide d,which affords means foremptying the chips or shavings therefrom when it-shall have become-filled. I f

D designates the removable hollow mandrelfor pointing the wooden casing of the This mandrel is generally cylindrical in form, but is provided with a tapering aperture running longitudinally thereof which converges inward from the mouth-opening D'. Formed in the side of said mandrel D and extending longitudinally thereof is an inclined opening e, which communicates with the tapered aperture therein and in which a knife f is .secured whose edge projects into the tapered aperture'of the mandrel and stands on a plane with the wall thereof. Projecting from the outer face of the mandrel D is a lug h, which is adapted to enter a way i, formed in the inner wall of the socket C, as shown in Fig. 1, tof-retain said mandrel in place when inserted in said socket and cause it to rotate therewith when said socket is rotated through the' said aperture parallel to the line of its ta- This chuck E is independent of 9 pered wall. the mandrel D, but is attached thereto by lieXible arms k, on opposite sides thereof, which cause the chuck Eto rotate with said mandrel, but permit kof lateral vibration of said chuck.

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In the operation of this device the hollow knife-carrying mandrel D, with its accompanying chuck E and complementary cuttinghead F, is placed in the socket C, as shown in Fig. l. The pencil to be sharpened is inserted in the aperture D of the mandrel D, when by a rotation of the shaft B, through the medium of the crank, said mandrel is revolved, causing the knife f to cut the wood from the end of. said pencil to an acuminated point, the pencil being held from rotating and forced gradually inward as its point is cut away by the rotation of said knife. The position of said knife is such that it only engages the casing of wood around the core of graphite or marking substance in the pencil, the point of which passes untouched through the mandrel D and into the head F, which is:

iiexibly connected with said mandrel D. The

knife 7L in said head F serves to point thev end of the graphite or marking substanceg forming the core of the pencil, and because of the flexible connection between the head F, carrying the pointing-knife, and the hol- Ef low mandrel D a lateral movement of the f pencil will not result in breaking off the point of the marking material, which is entered in the'head F, for the reason that any change in the angle of the pencil is accommodated by Q reason of the flexible mounting-of said chuck i E, carrying the head F, so that a long andir perfect point may be placed upon the pencil without danger of breaking the point ot' the marking substance, which is at the same time i pointed, as required, through the action ofi the knife h', or, if desired, the marking substance may be left unpointed by removing; the knife in the head F from contact therel with.

It will now be understood that by means of this improved device a pencil or markingstick of any character may be sharpened and pointed as desired without liability of breaking the point, enabling as well this operation of sharpening and pointing t0 be perfectly and quickly done, obviating, too, the dirt and litter incident to such work by coniining the chips or shavings within the circular case O, from which they may be removed at pleasure.

lVhile I have shown the spring-arms for `connectin g the auxiliary chuck with the mandrel D, it is evident that any suitable flexible mounting of the auxiliary chuck so as to cause it to move in unison with the mandrel D, but afford an independent lateral movement thereof, may be employed without departing from the spirit of my invention.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a pencil-Sharpener, the combination of the mandrel or socket for receiving the pointed end of the pencihthe iiexibly-mounted rotary chuck adjacent thereto carrying a knife for pointing the end of the marking substance.

2. In a pencil-Sharpener, the combination of the rotary mandrel for pointing the wooden casing of the pencil, the auxiliary chuck rotatin g therewith and iiexibly connected thereto so as to have independent lateral movement, said chuck carrying a pointing-knife.

3. In a pencil-Sharpener, the combination with the rotary mandrel for pointing the Wooden casing of the pencil, the auxiliary chuck carrying a knife for pointing the end of the marking substance located adjacent thereto, and the spring-arm connecting said chuck and mandrel so as to cause them to rotate in unison.

4. In a pencil-Sharpener, the combination of the rotary mandrel for pointing the wooden casing of the pencil, the chuck adjacent to the inner end thereof, the spring-arms connectin g said chuck with said rotary mandrel,

of the wood-cutting mandrel, the exiblymounted cutter-carrying chuck adjacent thereto, and the closed case embracing said parts.

In testimony whereof I affix my signature in presence of two witnesses.

FRANKLIN D. CORNELL. Witnesses:

W. J. GRAVES, CLINTON D. HARDY.

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